Crossing from northern thailand at chiang khong on the thai side of the mekong to huay xai on the laos side is popular with travelers coming from northern thailand on this 4 day trip our guide and driver meet you at houei say immigration checkpoint and transfer to the pie start a slow cruise down the mekong river to pak beng and visit luang prabang for some days this charming city of unesco world heritage site the luang prabang is a small dream like town on the mekong and nam khan rivers i